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Hi,

I tried to fit the correction factor with first order polynomial from 
the second bin and on the last bin I get negative value:

#mx_l mx_h  corr      err_corr
0.00     1.55     1.821 +- 0.577
1.55     1.90     3.260 +- 0.412
1.90     2.20     2.837 +- 0.304
2.20     2.50     2.446 +- 0.262
2.50     2.80     2.055 +- 0.301
2.80     3.10     1.664 +- 0.398
3.10     3.40     1.273 +- 0.521
3.40     3.70     0.882 +- 0.656
3.70     4.20     0.361 +- 0.844
4.20     5.00     -0.486 +- 1.160

(eps file attached)
So how do I proceed on this?

Antonio